PSD854F3A-15UI View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

PSD854F3A-15UI

Flash in-system programmable (ISP) peripherals for 8-bit MCUs, 5 V

STMicroelectronics 

PSD8XXFX

MCU bus interface

15.4

MCU bus interface examples

Figure 20, Figure 21, Figure 22, Figure 23, and Figure 24 show examples of the basic

connections between the PSD and some popular MCUs. The PSD Control input pins are

labeled as to the MCU function for which they are configured. The MCU bus interface is

specified using the PSDsoft Express Configuration.

Table 18.

8-bit data bus

BHE

X

X

A0

D7-D0

0

Even byte

1

Odd byte

Figure 19. An example of a typical 8-bit non-multiplexed bus interface

MCU

D[ 7:0]

A[ 15:0]

WR

RD

BHE

ALE

RESET

PSD

ADIO

PORT

WR (CNTRL0)

RD (CNTRL1)

BHE (CNTRL2)

RST

ALE (PD0)

PORT D

PORT

A

PORT

B

PORT

C

D [7:0]

A[ 23:16]

(OPTIONAL)

AI02879C

Doc ID 7833 Rev 7

61/128

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